Youmustrememberthat English is not entirely phonetic, so just because a student knows a word doesn't mean that they can understand it when it is said to them at native speed or pronounce it correctly.
When you calculate the value of that, youmustrememberthat the people who are best able to deploy your services to obtain the greatest return on their investment should be paying you more than those less able to profit from your advice or services.
This is the internet and one thing youmustremember about the internet is that the denizens of this digital empire are prone to worry and outrage in direct proportion to the lack of solid information on any given topic.